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Jon Titus
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Re: Introduction: Fundamentals of Designing With Microcontrollers
Jon Titus   1/16/2012 7:11:55 PM
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Q: Can you prevent Interrupt priority inversion with a watchdog timer?

A: Sure, that's one way to do it, but the watchdog timer will run continuously, which can make debugging a pain.  Right in the middle of some debugging, the WDT can trigger a reset.  Priority inversion occurs when a low-priority device monopolizes, or blocks, a system resource that a higher priority device needs to use. One way to prevent priority inversion is to write short interrupt-service routines. A real-time operating system or scheduler can help reduce this type of problem.



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